Coffee-roaster.



No. 836,341. PATENTED NOV. 20, 1906. N. B. POST. COFFEE ROASTER.

APPLIOATION FILED JULY 12, 1906.

3 SHEETS-SHEET 1.

2Vai/m171y i g: W Mam way M ATTORNEY.

PATENTED NOV. 20, 1906.

N. B. POST. COFFEE ROASTER.

APPLICATION FILED JULY 12, 1906.

. a SHEETS-SHBBT 2.

[N VEN 7' 0R.

ATTORNEY.

No. 836,341. PATENTED NOV. 20, 1906. N. B. POST.

COFFEE ROASTBR.

APPLICATION FILED JULY 12. 1906.

3 SHEETS-SHEET 3.

[N VEN T 01?.

NATHANIEL s.

Post, or sr. Louis, r'ssouar.

No. ss'asei.

Specification of Letters Patent.

Patented Nov. 20, 190@.

Application filed J 111y 12, 1906. Serial No. 825,921.

To all whom it may concern:

Be it known that l, NATHANIEL B. Peer, a citizen of the United States,residing at St. Louis, State of Missouri, have invented certain new anduseful improvements in Coffee- Roasters, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming a part hereof.

My invention has-relation to improvements in coffee-masters,- and itconsists in the novel details of construction more fully set forth inthe specification and pointed out in the claims. A

In the drawings, Figure 1 is a side elevation of my improved roaster.Fig. 2 is a rear end elevation thereof. Fig. 3 is a front end elevation,parts being broken away. Fig. 4 is a vertical sectional detail of theclutch mechanism, taken on the line 4 l of Fig. 5.. Fig. 5 is ahorizontal CIOSS'rSGClllOH on line 5 5 of Fig. 4. Fig. 6 is a verticalsection on line 6 6 of Fig. 5. Fig. 7 is a vertical cross-sea tion onthe broken line 7 7 of Fig. 1. Fig. 8 is a vertical cross-section online 8 8 of ig. i. Fig. 9 is a longitudinal vertical section on thebroken line 9 9| of Fig. '7. Fig. 16 is a cross vertical section on theline 110 ill of 9. Fig. 11 is a vertical sectional detail on line 11 1 1of Fig. 7 Fig. 12 is a side elevation of a roaster in which apreliminary roasting cyl inder is superposed over the regular series ofroasting-cylinders, the walls of v casing being partly broken away; Fig.13 is a vertical cross-section on line 13 13 of Fig. 12, and

Fig. 14 is an end elevation of the rear of Fig.

The object of my invention is to construct a roaster which will entirelyeliminate the danger of burning the coffee, one which will afford ampletime to the berry to swell during the roasting operation, one which'willconserve to the best advantage the aroma and flavor of the lcoffee, onewhich will insure a uniform product, one requirin a minimum amount offuel, one which wil completely eliminate the chaff and foreign materialfrom the berry, one which subjects the berry to an incipient dryingpreparatory to its final roasting and at the same time subjecting it tosuch drying 'eration while in the path of the products 0 distillationevolved from herries undergoing final roasting, one which will effectthe roasting in a minimum amount of time, one which is under perfectcontrol of the operator, and one possessing further'and ders a a h brevolve.

other advantages better apparent from a de- A into which thecoffee-berrms are deposited and from which they are subsequently fed tothe roasting-cylinders, as presently to be described. Mounted on thecasing, at the opposite end thereof, is anelectric motor M, (or any.equivalent motor,) whoseshaft ter nates in a belt-pulleyS, from whichleads a belt l along the rear side of the casing, said belt passing overa belt-pulley on the shaft of a fan located in the casing 6, aninduction! pipe 7, leading from the axis of the fan to the bottom of thecasing 1, Figs. 2, 3, and an reduction-pipe 8, leading fi'om th of thefan upward beyond the casing i, said eduction-pipe conducting away thechaff and light particles. The current passing through the pipe 8induces a currentin the shunt or elbow 9,-coupled to the pipe 8 and.opening into the casing 1 through the top thereof. Mountedlongitudinally at 'a convenient height above the floor and adjacent tothe casing is a shaft 10, whose rear endcarries a e periphery"belt-pulley ill, from which leads abut-i2 to the pulley 3, thisconnection'servmg to impart rotation to the shaft 10. The shaftterminates in a belt-pulley passes a belt 14 overs and ofa central shaft1a, which forms the axisabout which the series of roasting-cylin- Thegearing described pulley 15 at the rear constitutes the driving reducinggear, with which'the pulley 15 may be thrown into engagement or fromwhich it may be disengaged by a special clutch arrangement, the detailsof which are shown in Figs. 4c, 5, and 6 and which is as follows:Pivoted to a bracket 17, projecting from the rear Wall of the casing,is. a clutchdever 18. whose forked. end enga es an annular rcove19,:formed in the hub o the pulley 15, which is mounted loosely on theshaft 16, being in addition movable longitudinally thereon,) said hubconstituting the male section of a clutch which cooperates with thefemale section of the hub portion of a pinion 20, likewise looselymounted on the shaft 16.

The pinion meshes with the large section of a Stepgear 21, mounted on aspindle 22, secured to the wall of the casing l, the re portion for aspeed -13, from which IDS connecting the hopper duced or smaller section21 of said step-gear meshing in turn with a gear 23, keyed to the shaft16. Thus it will be seen that by causing an engagement between thepulley and pinion reduced rotation may be'imparted to the shaft ldi'romthe shaft 10, which in turn has rotation imparted to it from the motor Mthrough the belt 12 and pulley 11. Disposed about the shaft to (whichmay be denominated asthe cylindershait) are a series of pairs ofroasting cylinders or receptacles a a l) h, (two pairs being shownherein) which are coupled to said shaft by means of the radiating armsof the spiders 2t, secured'to the shaft. Eachcylinder is composed ofclosed terminal heads and a peripheral body of 'WllB fabric, as shown,and of a mesh sufficiently close to confine the berries. Ji ithin eachcylinder is a spiral conveyor 25, Whose axis or shaft 26 is stationaryrelatively to the Walls of the cylinder. Located at one end of each pairof roasting eylinde s is a receiving mouth or intake 27, which receivesthe codes from the impper 2,, as presently tobe described, the codes int e cylinder c passing out oisaid cylinder at the opposite end throu hthe duct 28, connecting the cylinders, Fig. 10, whence it passes intocylinder (thesame heing true with respect to h and 5 thence alongcylinder e around the spiral eon veyer doerein and out oi thedelivery-spout 29 at the end adjacent to the intake 2:7 of thecontiguous cylinder c of the pair. The cofilee as discharged, h'om thecylinders passes down the inclined wall. 36 whence it is delivered ontoa' belt conveyor at the (his end oil the belt 31 is located immediatelyover the dischargespou-t 32 of the casing, through which spout theroasted coffee is disehargedfthe chail-and light particles losing drawninto the pipe '2 tan 6 and discharged through the pipe 8; The helt 31 ismounted 'hetween suitable rollers or pulleys 33, the shalt 34 oione ofthe pulleys terminating in a hot-Wheel 35,'to,

which rotation is imparted from the cylindershaft 16 through the mediumoi the sprocketchain 36, passing over a sprocket wheel it? at the frontend oi? the shait if. The roast: ing-cyl-inders are fed withpredetermined quantities of the coffee, said quantity heing meas beforefinally discharged into the intake-month ders. This combined measuringand feed mechanism, which Is likewise actuated from the cylinde shaft,may be desorid as fol lows: Adjacent to the sproclret wheel 37' is asprocket-Wheel 38, whence passes a sprocketchain 39 over a s rocketvveel 40 on a camshaft 41, mounts respectivelg, on a bracket 42, Fig. 7,and in the walls of t e chamber t3,- 2 to the main casing t. The rearand .f the shaft 41 carries a crank arm 44, Fig. 8, which in turn isconnect legs.

ted into the roasting-cylinders.

by loosenin to support 27 of any given pair oi cylin between the endsofw ing coupled pivotally to sac et.

pivotally to the adjacent end of a link 45, whose opposite end iscoupled to an oscillating lever d6, pivoted to the Wall of the chamber4:3, the long arm of said lever being coupled pivotally to one end of alink 47, Whose opposite end is secured. to a pin 48, carried by areciprocating feed-box or cut-0d 49, said inbeing free to operate in aslot 50, formed n the rear member-of the upper overhanging portion 43 ofthe chamber 43. These overanging members or ortions 43 of the chamber d3form guides hetween which the box 49 may reciprocate, by the bottom wallbetween the guides,F1gs. 7, 8. The top of this box 'or receptacle 4-9 isclosed by the angle pieeesor plates 51 5'2, res actively, the verticalleg of the member 51 eing connected to the inner end of an adjustinloolt 53, over Whose outer screwthreaded portion operates a nut 54,bearing against the end wall of the box. By turning the nut in eitherdirection the bolt 53, and hence the angle-piece 5i will be moved hack-Ward and forward and its distance fromthe angle-piece 52 ulation servesto adjust the distance between the vertical le' oi the respectiveanglepieces 51 52, an hence regulates the capacity of the cubic contentsbetween said vertical in this way the quantity of codes admitted fromthe feed-hopper 2' into the space between the vertical legs of theangle-pieces can be adjusted to a nieety before it is admit Thedischarge-menthol the hopper 2 may be entirely closed by shoving themember 52 up against the member 51, which may be done the clampirgmut55, carried by the top We passing. freely through a slot 56, formed inthe horizontal lie of said memher 52. The i e tightened and the coffeeer 2. ltwill he nut 55 can then entirely cut oil from the hop seen thatwith rotation of t eshaft 41 a reciprocationvvill he imparted to the boxor cut-off 49, each reciprocation taking away a uantity of cot-fee,which is then advanced song the stationary-,.hottorn between the guides.43

the coffee, Whenthe latter drops through the chamber A153, landing onthe closed releasingings 57 57, located immediately over tie intakemouths 27 of each paired roasting-cylinders. @nce the coffee has landedon the Wings 57 57 it is released by the following mechanism:Therotating cam-shaft 41 carries at its front end a cam is termed ashoulder 59. Riding-over the Zoom-surface is a lug 60, forming a part ofan actuating-lever 61, pivoted at one end to the -bracket 42, theopposite end having coupled thereto the link 62, from whichpivotallydepend the pair of links 63 63;, these in turn bethe adjacent ends ofthe box being supported carefully regulated. This reguntil said bottomno longer serves of the box, the stem of the nut hose cam-surfaces therevolution of the cy inders, means for adjacent cylin er of anydischarged end of said member, means for causing the material to travelto the o posite end during conducting the material to the adjacentmember of the same pair 'andcausing it totravel back toa point adjacentto the intake end of the first member, and means for discharging thematerial at said end, substan'' tially as set forth.

3. In a roaster, a suitable burner, a series of roasting-cylindersarranged in volving about a common axis disposed above the burner,means'for feeding thematerial at one end of one 'I'nemberof each pair,means for causing the material to traverse the length of one 0. linder,thence pass into the air and through the latter back to a point a jacentthe intake of the first cylinder, a belt for conveying the roastedproductfrom the cylinders, and an exhaust 1n the path of the material asfinally for removing the chaff an'd'light particles, substantially asset forth.

4. In a roaster, a burner, aseries of roasting-cylinders revolvmg abouta common axis disposed above the burner, and a preliminaryroastersuperposed above the series of roasting-cylinders, substantiall as setforth.

5. In a roaster, hopper therefor, a series of roasting-cylindersrevolving about a common axis mounted in the casing, a reciprocatingfeeder or cut-off adapted to conduct predetermined quantities of thematerial from the discharge-mouth of the hopper, apair of hinged wingsnormally closing against. one another for momentarily intercepting thematerial delivered by .the cut-off, intermediate driving connectionsbetween the cut-ofi and wings for opening the latter at specified timesand releasing the material, a portion of the cylinders being providedwith intakes for receiving the material so released,'means fordischarging the mate rial from the roasters, and an exhaust for carryingvoif the chaff and light particles, substantially as set forth.

6. In a roaster, a suitable casing, a hopper therefor, a reciprocatingfeed-box or cut-oil for abstracting and delivering predeterminedquantities of the material, intermediate connections between the'shaftand cut-oif for actuating the latter, a cam on another and pairsrecylinders,- an a preliminalv a suita le casing, a feed-' common axisexterior to mders, a burner beneath the cylinders, a hopper, a'feed-boxor a rotatable shaft,

the shaft, a lever pivoted at one end and provided with a lug ridingover said cam, a pair of hinged wings adapted to fold against one form atemporary su port for the material delivered by the cut-o andintermediate link connections between the lever and W' s for actuatingthe latter with the turning of the shaft and with the reciprocation ofthe cut-off, substantially as set forth.

7. In a roaster, a suitable casing, a hopper therefor, a reciprocatingfeed-box, or cut-oii for abstracting and delivering the material fromthe hopper, means for adjusting the capacity of the feed-box, a pair ofnormally closed Wings for receiving the contents of the box, means for osuing the wings at predetermined interva s for releasing the contentsintercepted thereby, and a series of roastingcylinders revolving about acommon axis for receiving the material released by the Wings,substantially as set forth.

8. In a roaster, one or moreroasting-cylinders revolvin about an axisexterior to the roaster revolving about its own axis an disposed in thepath of the volatile products escaping from the material treated in theroasting-cylinders, substantially as set forth.

9. In a roaster, a casing, a preliminary roasting-cylinder revolvingabout its axis, a'

series oiroastmg cylinders located below the preliminary cylinder andrevolving about a the axes of the cylcut oif for the hopper, means fordischargin the material from the feed-box to the prelimina roaster,means for intercepting the materia discharged from the reliminaryroaster andsubsequently effect n its release, means for discharging thematerial thus releasedinto-the series of roasting-cylinders, a commonsource of heat-su ply for the cylinders, a motor, and suit-ab e gearingfor actuating the several movable parts in unison, substantially as setforth. r In testimony whereof I. afiix mysignature in presence of twowitnesses.

, NATHANIEL B. POST.

Witnesses:

'EMIL STAREK,

Jos. A. Mrcnna.

